I mean I guess if you're the kind of person who likes to spend money on art. Maybe it's just me, I'm not on a vast wage and I have basically everything I want and money in the bank, I've always been good at managing my money so I probably just can't understand the mentality of someone being that careless and stupid with money. I'd have a £10m yacht, house and all my friends set up for life and I guarantee I'd die with at least £50m in the bank having lived a great life. I also completely understand that people tend to spend more as they earn more, so I suppose the kind of person who can't budget with a regular salary couldn't also budget with £100m
I think you're missing the point. It's a different situation to having a "regular salary". You think you wouldn't fall for it all and end up bankrupt after winning a lot of money. As I said, I think the same thing. But so did most if not all of the people who did just that.
I am a minimum wage flunkey. I have everything I want and money in the bank despite having spent a relatively large amount on toys and unexpected required expenditure last year. Having £3000 spare money is a lot for a minimum wage flunkey. I can budget very well and I've been lucky. In particular, I was able to get a mortgage on a house ~20 years ago and looked for one in a decent neighbourhood that was still cheap (no conveniently local schools, crap parking, all terraced housing). I spend very little and consistently save £100 a month despite being a minimum wage flunkey. I have learned to budget very well.
However, I understand that has almost no relevance at all to suddenly having £100M. It's a completely different set of circumstances. It would impose change on you. The only question is how you would change. We all like to think we're wise enough to handle it, but many people who thought that were wrong. It's wise to acknowledge the possibility that you could mess it up as that's part of being able to avoid messing it up.
I would probably be fine because I am naturally a recluse. My lottery fantasy is my own little island, population 1. Not a tropical paradise island costing umpteen million for a few hundred square yards. Ideally, I'd like a small island just off the coast of England. I like living here. It's my home. Anyway...on my lottery fantasy island I wouldn't have much pressure or even opportunity to spend huge amounts of money. A few million for the island and a luxurious small house with lots of toys and I'd be sorted. Family members would get an income from secure investments, not just be handed cash willy nilly. Ex coworkers would get gifts (for tax reasons) and a "I HAVE ESCAPED!" blowout party. And hardly anyone would see me again. A visit to the mainland every few weeks for shopping and to say hello to a few people.
But I still acknowledge the possibility that I could mess it up and end up broke because I am not particularly special and many people who have suddenly acquired a lot of money have messed it up and ended up broke. Why would I be utterly sure I'd avoid it when they didn't?